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How to Manage Pests
UC Pest Management Guidelines
Citrus
Loopers
Scientific Names:
Citrus looper: Anacamptodes fragilaria
Cabbage looper: Trichoplusia ni
(Reviewed 9/08,
updated 9/08)
In this Guideline:
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Loopers occur in most citrus-growing areas, usually together with
other orangeworms. The larvae have no prolegs in the middle of the body and
therefore move in a characteristic looping or measuring fashion. The female moth lays about 100 pale green, spherical eggs singly on leaves; there are several
generations a year.
Looper larvae mainly consume new growth flushes, but also feed on
blossoms and young fruit; they rarely damage mature fruit. Very young larvae
typically feed on lower leaf surfaces along the leaf margin. Mature larvae,
which are about 1.5 inch (3.7 cm) long, eat holes in leaves or consume them entirely.
Loopers have many natural enemies, including Apanteles sp. Treatment for loopers on citrus is rarely required.
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UC IPM Pest Management Guidelines: Citrus
UC ANR Publication 3441
Insects, Mites, and Snails
E. E. Grafton-Cardwell, Kearney Agricultural Center, Parlier
J. G. Morse, Entomology, UC Riverside
N. V. O‘Connell, UC Cooperative Extension, Tulare County
P. A. Phillips, UC IPM Program, UC Cooperative Extension, Ventura County
C. E. Kallsen, UC Cooperative Extension, Kern County
D. R. Haviland, UC Cooperative Extension, Kern County
Acknowledgments for contributions to Insect, Mites, and Snails:
J. Barcinas, E. S. I., Corona, CA
R. Dunn, Badger Farming County, Exeter, CA
J. Gorden, Pest Management Associates, Exeter, CA
H. Griffiths, E. S. I., Corona, CA
D. Machlitt, Consulting Entomology Services, Moorpark, CA
C. Musgrove, retired entomologist, Riverside, CA
K. Olsen, S & J Ranch, Pinedale, CA
T. Roberts, E. S. I., Corona, CA
J. Stewart, Pest Management Associates, Exeter, CA
P. Washburn, Washburn & Sons Citrus Pest Control, Riverside, CA
K. Godfrey, USDA Biological Control, Sacramento
D. Headrick, California Polytechnic State University, San Luis Obispo
B. Faber, UC Cooperative Extension, Ventura County
J. Kabashima, UC Cooperative Extension, South Coast Research and Extension Center
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